Feedback Loop (FBL)
Also known as: FBL, Complaint Feedback Loop
A feedback loop is a system where inbox providers tell you when someone marks your emails as spam. It gives you a clear signal so you can remove complainers fast and protect your sender reputation.
Feedback loops are alerts from inbox providers that tell you when someone marks your email as spam. Instead of guessing who is unhappy, you get a clear signal tied to a real subscriber. This helps you see which emails cause complaints. It is one of the basic tools for keeping your email list healthy.
These alerts protect your sender reputation. When you know who complained, you can stop emailing them before more damage happens. Over time you will notice patterns in which subject lines, offers, or lists lead to more spam clicks. That detail lets you fix problems early so more of your email lands in the inbox.
For most senders the hard work happens behind the scenes in tools like Bento, which receive and process this data for you. Your job is to review complaint numbers, remove complainers, and adjust how often and what you send. Aim to keep complaints very low, around 0.1 percent or less of delivered emails. If you see a spike, pause and clean your list before sending again.
Related Terms
Reputation(Sender Reputation)
Sender reputation is the trust score mailbox providers give your emails based on how you send and how people react. It helps decide if your messages land in the inbox or get pushed to spam.
Learn more →Sender Score
Sender Score is a 0 to 100 rating of your sending reputation. A higher score means inbox providers are more likely to trust your emails and keep them out of spam.
Learn more →Spam
Spam is any email sent to someone without their clear permission or after they have lost interest in hearing from you. It is email that feels unwanted or irrelevant to the person receiving it.
Learn more →Spam Trap(Honeypot Address)
A spam trap is an email address used by inbox providers to spot bad or careless senders. Hitting one damages your sender reputation and makes it more likely your emails go to spam.
Learn more →